Quick reply while I have a sec. Honestly, the Vello FreeWave Plus Wireless Remote Shutter Release for Canon N3 is a solid middle ground. It uses 2.4GHz so the range is huge, plus it has that shutter lock for long exposures. Another decent budget pick is the Pixel RW-221/N3 Wireless Shutter Remote Control for Canon. Both are way better than that app, tho neither is fully waterproof so maybe keep em in a baggie if Seattle gets rainy.

I totally get the frustration with apps—they're basically useless for pro architecture work where timing and reliability are everything! You need a dedicated 2.4GHz FSK (Frequency Shift Keying) system. This tech is fantastic because it effectively eliminates signal interference and gives you massive range compared to flaky Bluetooth stuff. I highly recommend the Vello FreeWave Plus Wireless Remote Shutter Release for Canon N3 Connection. It is a total beast and usually sits well under $60! Heres why the specs are perfect for your Seattle gig:

• It utilizes 16 distinct channels so you wont get cross-talk from other devices.
• Range is rated for 320 feet (100m), so 30 feet is an absolute cakewalk for this signal.
• The transmitter features a dedicated shutter lock for those long exposure architectural shots.
• It runs on standard AAA batteries, which is a massive plus for field work. If you want something even more compact, check out the SMDV RFN-4 Wireless Remote Shutter Release Kit for Canon 5D Mark IV. The receiver is tiny and mounts directly to the N3 port without a cable, which is great for keeping things clean in light rain. Both options use radio waves rather than infrared, so you dont even need line-of-sight to fire the shutter! Honestly, the reliability jump from an app to a 2.4GHz radio trigger is just incredible... you're gonna love it.

Honestly, the Canon Connect app is basically trash for professional work, totally feel your pain there. In my experience, you need a dedicated 2.4GHz radio trigger to get that rock-solid 30ft range without it dropping every few seconds like Bluetooth tends to do. Over the years I've tried many, but these two are the winners for the 5D Mark IV N3 port:

• Vello FreeWave Fusion Wireless Remote Shutter Release for Canon N3. This thing is a total workhorse. It has 16 channels to avoid interference and a physical shutter lock for long exposures. Its not fully sealed but its survived plenty of Seattle mist in my gear bag without glitching out.
• Hahnel Captur Remote Control and Flash Trigger for Canon. This one feels way more robust and pro. The range is insane, like 100 meters, so 30 feet is nothing for it. Plus it uses AA batteries which is a huge plus when youre out in the field and need a quick swap. Both are way better than those generic Amazon ones... seriously, just get one of these and youll never look back.